“Half the Sky” is more than a four-hour PBS documentary series; it is a movement to turn oppression into opportunity for women worldwide.

The documentary, which premiered earlier this month, is the film manifestation of the best-selling book by New York Times writers Nicholas Kristof and Sheryl WuDunn. It follows Kristof and six American actresses as they travel to different countries in the developing world to explore issues facing women, from gender-based violence in Sierra Leone to sex slavery in Cambodia (featured in this clip).

The film swings from inspirational, to horrifying, to unspeakably sad. But while watching it will undoubtedly be a heavy experience, it will also be one that hopefully impels you to action – or at the very least provides a greater awareness of the things you witness in the places you travel.

The full documentary can currently be viewed only on PBS, but selected clips are available online.